ATtiny20 Atmel Corporation, ATtiny20 Datasheet - Page 4

• Manufacturer Part Number: ATtiny20
• Manufacturer: Atmel Corporation

Specifications of ATtiny20

• Flash (kbytes): 2 Kbytes
• Pin Count: 14
• Max. Operating Frequency: 12 MHz
• Cpu: 8-bit AVR
• # Of Touch Channels: 5
• Hardware Qtouch Acquisition: Yes
• Max I/o Pins: 12
• Ext Interrupts: 12
• Usb Speed: No
• Usb Interface: No
• Spi: 1
• Twi (i2c): 1
• Graphic Lcd: No
• Video Decoder: No
• Camera Interface: No
• Adc Channels: 8
• Adc Resolution (bits): 10
• Adc Speed (ksps): 15
• Analog Comparators: 1
• Resistive Touch Screen: No
• Temp. Sensor: Yes
• Crypto Engine: No
• Sram (kbytes): 0.12
• Self Program Memory: NO
• Dram Memory: No
• Nand Interface: No
• Picopower: No
• Temp. Range (deg C): -40 to 85
• I/o Supply Class: 1.8 to 5.5
• Operating Voltage (vcc): 1.8 to 5.5
• Fpu: No
• Mpu / Mmu: no / no
• Timers: 2
• Output Compare Channels: 4
• Input Capture Channels: 1
• Pwm Channels: 3
• 32khz Rtc: No
• Calibrated Rc Oscillator: Yes

2. Overview
4
ATtiny20
ATtiny20 is a low-power CMOS 8-bit microcontroller based on the compact AVR enhanced
RISC architecture. By executing powerful instructions in a single clock cycle, the ATtiny20
achieves throughputs approaching 1 MIPS per MHz allowing the system designer to optimize
power consumption versus processing speed.
Figure 2-1.
The AVR core combines a rich instruction set with 16 general purpose working registers and
system registers. All registers are directly connected to the Arithmetic Logic Unit (ALU), allowing
two independent registers to be accessed in one single instruction executed in one clock cycle.
PROGRAMMING
INSTRUCTION
INSTRUCTION
INTERFACE
PROGRAM
REGISTER
DECODER
CONTROL
DATA REGISTER
FLASH
LOGIC
LINES
ISP
PORT A
Block Diagram
V
DRIVERS
PORT A
CC
PA[7:0]
REG. PORT A
INTERRUPT
REGISTERS
DIRECTION
PROGRAM
REGISTER
COUNTER
GENERAL
PURPOSE
POINTER
STATUS
STACK
SRAM
UNIT
ALU
X
Y
Z
GND
8-BIT DATA BUS
DATA REGISTER
PORT B
MCU STATUS
OSCILLATOR
RESET FLAG
WATCHDOG
COUNTER0
COUNTER1
REGISTER
REGISTER
INTERNAL
TIMER/
TIMER/
TIMER
TWI
SPI
DRIVERS
PORT B
PB[3:0]
RESET
REG. PORT B
DIRECTION
COMPARATOR
OSCILLATOR
CALIBRATED
TIMING AND
CONTROL
ANALOG
ADC
8235B–AVR–04/11